Abstract: A method and apparatus for setting a time delay value in an electronic fuze of a projectile exiting the muzzle of a gun barrel, in which a single transmitter coil concentrically mounted to the gun muzzle is utilized both to sense the presence of the projectile at the gun muzzle and to inductively transmit a radio frequency signal having a duration proportional to the fuze time delay value to a receiver coil disposed on the projectile. The transmitter coil is energized from a radio frequency oscillator before the projectile is fired. As the front end of the projectile begins to emerge from the gun muzzle, its presence is detected by a change in the transmitter coil impedance, and the transmitter coil is automatically deenergized.

Abstract: A compact beam splitter apparatus for use with a surface wave acousto-optic time integrating correlator, including a beam splitter for splitting a laser light beam into two beams and a Koesters prism disposed in the paths of the two beams for folding a portion of each beam so that the two folded beam portions converge to a common beam position at a predetermined acute angle between the two beam portions. A single Koesters prism may be used as the beam splitter and the beam folding device, with two mirrors being used to reflect the two beams back to the Koesters prism.

Abstract: A diffraction radiation generator in which a ribbon electron beam is directed over a diffraction grating within an open resonator at a selected velocity to generate coherent radiation. After passing through the open resonator, the ribbon beam is directed through aligned slits in two or more conductive elements to a collector. Progressively negative voltages relative to the grating voltage can be applied to the elements and the collector to decelerate the electrons forming the ribbon beam and thus minimize heating of the collector and increase the operating efficiency of the generator. Also, the elements and the collector can be utilized to analyze the ribbon beam.